Anderson Miles said:

I read in another post about using J9 external board to board connector and I have the following questions

1. Is using the j9 board to board my only option?

J9 on IDDK does a different task, cant understand your query.

Anderson Miles said:

2. Is there a way to set up and use other sections of development board such as h15 or h13 for general GPIOs for easy prototyping? If so how?

Some GPIO pins are indeed brought out on these headers. If you want to use them for any purposes, you may connect an appropriate cable to bring them to your target board for eval.

Anderson Miles said:

3. Are there places I could solder pins to bring out the SPI signals? 

It is possible. Pls review the schematic and board for such information. 

1. How can I set up h15 or h13 pins for SPI communication? 

For my project: I will need a total of 9 pins. 4 for SPI communication and 5 to be configured as external input for interrupts

2. I can see from the following pictures that I could probably use the following header pins：

H13 pin# 4: En-TxEn =GPIO 32

H13 pin# 10:En-TxClkEn=GPIO 44

H13 pin# 12:CompOutSC-A=GPIO 15

H13 pin# 14:CompOutSC-B=GPIO 14

H15 pin# 6: GPIO 45

I cannot find which GPIOs the other header pins are connected to or whether they are available to be reconfigured.

Where would I find this information?